OpenE2K/rust
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Added the RUST_SEED env variable to seed the Rust task scheduler -- helpful when debugging task race conditions within a single thread domain.

Browse Source
This commit is contained in:
Michael Bebenita 2010-08-09 07:30:48 -07:00
parent 768adb3ddd
commit c5744c8aef
1 changed files with 14 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
src/rt/rust_util.h
View File

@ -140,11 +140,20 @@ isaac_init(rust_dom *dom, randctx *rctx)
CryptReleaseContext(hProv, 0));
}
#else
int fd = open("/dev/urandom", O_RDONLY);
I(dom, fd > 0);
I(dom, read(fd, (void*) &rctx->randrsl, sizeof(rctx->randrsl))
== sizeof(rctx->randrsl));
I(dom, close(fd) == 0);
char *rust_seed = getenv("RUST_SEED");
if (rust_seed != NULL) {
ub4 seed = (ub4) atoi(rust_seed);
for (size_t i = 0; i < RANDSIZ; i ++) {
memcpy(&rctx->randrsl[i], &seed, sizeof(ub4));
seed = (seed + 0x7ed55d16) + (seed << 12);
}
} else {
int fd = open("/dev/urandom", O_RDONLY);
I(dom, fd > 0);
I(dom, read(fd, (void*) &rctx->randrsl, sizeof(rctx->randrsl))
== sizeof(rctx->randrsl));
I(dom, close(fd) == 0);
}
#endif
randinit(rctx, 1);
}